X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b67f7ec359806293a6da14208bad56b842dedb60..4b3f6d79ea9174d97f3f82177fa9ded4ad485172:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index a976217d..9139d3bd 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -47,8 +47,9 @@ // different initial value (CRC_ICLASS) #include "iso14443crc.h" #include "iso15693tools.h" -#include "cipher.h" #include "protocols.h" +#include "optimized_cipher.h" + static int timeout = 4096; @@ -1041,6 +1042,10 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain Dbprintf("Done..."); } +void AppendCrc(uint8_t* data, int len) +{ + ComputeCrc14443(CRC_ICLASS,data,len,data+len,data+len+1); +} /** * @brief Does the actual simulation @@ -1052,6 +1057,8 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) // free eventually allocated BigBuf memory BigBuf_free_keep_EM(); + State cipher_state; +// State cipher_state_reserve; uint8_t *csn = BigBuf_get_EM_addr(); uint8_t *emulator = csn; uint8_t sof_data[] = { 0x0F} ; @@ -1068,12 +1075,20 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]); ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]); + uint8_t diversified_key[8] = { 0 }; // e-Purse uint8_t card_challenge_data[8] = { 0x00 }; if(simulationMode == MODE_FULLSIM) { + //The diversified key should be stored on block 3 + //Get the diversified key from emulator memory + memcpy(diversified_key, emulator+(8*3),8); + //Card challenge, a.k.a e-purse is on block 2 memcpy(card_challenge_data,emulator + (8 * 2) , 8); + //Precalculate the cipher state, feeding it the CC + cipher_state = opt_doTagMAC_1(card_challenge_data,diversified_key); + } int exitLoop = 0; @@ -1085,7 +1100,7 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) // Tag CSN uint8_t *modulated_response; - int modulated_response_size; + int modulated_response_size = 0; uint8_t* trace_data = NULL; int trace_data_size = 0; @@ -1132,8 +1147,12 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; - //This is used for responding to READ-block commands - uint8_t *data_response = BigBuf_malloc(8 * 2 + 2); + //This is used for responding to READ-block commands or other data which is dynamically generated + //First the 'trace'-data, not encoded for FPGA + uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer + //Then storage for the modulated data + //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes) + uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2); // Start from off (no field generated) //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); @@ -1153,9 +1172,9 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) LED_A_ON(); bool buttonPressed = false; - + uint8_t response_delay = 1; while(!exitLoop) { - + response_delay = 1; LED_B_OFF(); //Signal tracer // Can be used to get a trigger for an oscilloscope.. @@ -1197,25 +1216,18 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) } else if(receivedCmd[0] == ICLASS_CMD_CHECK) { // Reader random and reader MAC!!! if(simulationMode == MODE_FULLSIM) - { //This is what we must do.. - //Reader just sent us NR and MAC(k,cc * nr) - //The diversified key should be stored on block 3 - //However, from a typical dump, the key will not be there - uint8_t *diversified_key = { 0 }; - //Get the diversified key from emulator memory - memcpy(diversified_key, emulator+(8*3),8); - uint8_t ccnr[12] = { 0 }; - //Put our cc there (block 2) - memcpy(ccnr, emulator + (8 * 2), 8); - //Put nr there - memcpy(ccnr+8, receivedCmd+1,4); - //Now, calc MAC - doMAC(ccnr,diversified_key, trace_data); + { + //NR, from reader, is in receivedCmd +1 + opt_doTagMAC_2(cipher_state,receivedCmd+1,data_generic_trace,diversified_key); + + trace_data = data_generic_trace; trace_data_size = 4; CodeIClassTagAnswer(trace_data , trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; + response_delay = 0;//We need to hurry here... + //exitLoop = true; }else { //Not fullsim, we don't respond // We do not know what to answer, so lets keep quiet @@ -1246,12 +1258,39 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) } else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){ //Read block uint16_t blk = receivedCmd[1]; - trace_data = emulator+(blk << 3); - trace_data_size = 8; + //Take the data... + memcpy(data_generic_trace, emulator+(blk << 3),8); + //Add crc + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; CodeIClassTagAnswer(trace_data , trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; + }else if(receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM) + {//Probably the reader wants to update the nonce. Let's just ignore that for now. + // OBS! If this is implemented, don't forget to regenerate the cipher_state + //We're expected to respond with the data+crc, exactly what's already in the receivedcmd + //receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b| + + //Take the data... + memcpy(data_generic_trace, receivedCmd+2,8); + //Add crc + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIClassTagAnswer(trace_data , trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } + else if(receivedCmd[0] == ICLASS_CMD_PAGESEL) + {//Pagesel + //Pagesel enables to select a page in the selected chip memory and return its configuration block + //Chips with a single page will not answer to this command + // It appears we're fine ignoring this. + //Otherwise, we should answer 8bytes (block) + 2bytes CRC } else { //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44 @@ -1278,7 +1317,7 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) A legit tag has about 380us delay between reader EOT and tag SOF. **/ if(modulated_response_size > 0) { - SendIClassAnswer(modulated_response, modulated_response_size, 1); + SendIClassAnswer(modulated_response, modulated_response_size, response_delay); t2r_time = GetCountSspClk(); } @@ -1588,7 +1627,10 @@ uint8_t handshakeIclassTag(uint8_t *card_data) static uint8_t act_all[] = { 0x0a }; static uint8_t identify[] = { 0x0c }; static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - static uint8_t readcheck_cc[]= { 0x88, 0x02 }; + + + static uint8_t readcheck_cc[]= { 0x88, 0x02,}; + uint8_t resp[ICLASS_BUFFER_SIZE]; uint8_t read_status = 0; @@ -1623,30 +1665,38 @@ uint8_t handshakeIclassTag(uint8_t *card_data) if(ReaderReceiveIClass(resp) == 8) { //Save CC (e-purse) in response data memcpy(card_data+8,resp,8); - - //Got both - read_status = 2; + read_status++; } return read_status; } + // Reader iClass Anticollission void ReaderIClass(uint8_t arg0) { - uint8_t card_data[24]={0}; - uint8_t last_csn[8]={0}; + uint8_t card_data[6 * 8]={0}; + memset(card_data, 0xFF, sizeof(card_data)); + uint8_t last_csn[8]={0}; - int read_status= 0; - bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; - bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC; - set_tracing(TRUE); - setupIclassReader(); + //Read conf block CRC(0x01) => 0xfa 0x22 + uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x01, 0xfa, 0x22}; + //Read conf block CRC(0x05) => 0xde 0x64 + uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64}; - size_t datasize = 0; - while(!BUTTON_PRESS()) - { + int read_status= 0; + uint8_t result_status = 0; + bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; + bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; + set_tracing(TRUE); + setupIclassReader(); + + uint16_t tryCnt=0; + while(!BUTTON_PRESS()) + { + if (try_once && tryCnt > 5) break; + tryCnt++; if(!tracing) { DbpString("Trace full"); break; @@ -1656,15 +1706,40 @@ void ReaderIClass(uint8_t arg0) { read_status = handshakeIclassTag(card_data); if(read_status == 0) continue; - if(read_status == 1) datasize = 8; - if(read_status == 2) datasize = 16; + if(read_status == 1) result_status = FLAG_ICLASS_READER_CSN; + if(read_status == 2) result_status = FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CC; + + // handshakeIclass returns CSN|CC, but the actual block + // layout is CSN|CONFIG|CC, so here we reorder the data, + // moving CC forward 8 bytes + memcpy(card_data+16,card_data+8, 8); + //Read block 1, config + if(arg0 & FLAG_ICLASS_READER_CONF) + { + if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf),card_data+8, 10, 10)) + { + Dbprintf("Failed to dump config block"); + }else + { + result_status |= FLAG_ICLASS_READER_CONF; + } + } - //Todo, read the public blocks 1,5 aswell: - // - // 0 : CSN (we already have) + //Read block 5, AA + if(arg0 & FLAG_ICLASS_READER_AA){ + if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA),card_data+(8*4), 10, 10)) + { +// Dbprintf("Failed to dump AA block"); + }else + { + result_status |= FLAG_ICLASS_READER_AA; + } + } + + // 0 : CSN // 1 : Configuration - // 2 : e-purse (we already have) - // (3,4 write-only) + // 2 : e-purse + // (3,4 write-only, kc and kd) // 5 Application issuer area // //Then we can 'ship' back the 8 * 5 bytes of data, @@ -1674,10 +1749,10 @@ void ReaderIClass(uint8_t arg0) { //Send back to client, but don't bother if we already sent this if(memcmp(last_csn, card_data, 8) != 0) { - - if(!get_cc || (get_cc && read_status == 2)) + // If caller requires that we get CC, continue until we got it + if( (arg0 & read_status & FLAG_ICLASS_READER_CC) || !(arg0 & FLAG_ICLASS_READER_CC)) { - cmd_send(CMD_ACK,read_status,0,0,card_data,datasize); + cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data)); if(abort_after_read) { LED_A_OFF(); return; @@ -1685,10 +1760,10 @@ void ReaderIClass(uint8_t arg0) { //Save that we already sent this.... memcpy(last_csn, card_data, 8); } - //If 'get_cc' was specified and we didn't get a CC, we'll just keep trying... + } LED_B_OFF(); - } + } cmd_send(CMD_ACK,0,0,0,card_data, 0); LED_A_OFF(); }